Calcining apparatus



No. 6I8,902. Patented Feb. 7, I899. W. T. POWERS.

CALCINING APPARATUS.

(Application filed May 17, 1898.)

(No Model.)

| NV ENT 0 R2 WU cvmT. Pow m s s E 5 s E N T w NrTED STATES PATENT FFICE.

CALCINING APPARATUS;

SPECIFICATION formingpart of Letters Patent-No. 618,902, dated February 7, 1899.

Application filed May 1'7, 1898. Serial No. 680,999. (No model.)

To aZZ whom, it may concern:

Be it known that I,W1LLIAM-T. POWERS, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have in vented certain new and useful Improvements in Oalcining Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in devices for calcining-gypsum; and its object is to provide the same with means for evenly and economically applying the heat and also for more readily separating the parts for transportation and repairs, to remove the kettle from the brick setting without disturbing the latter, and certain other new and useful features, all of which are hereinafter more fully described, and particularly pointed out in the claims. 7

Referring to the accompanying drawings, Figure-1 is a side elevation of a device embodying my invention with parts broken away, and Fig. 2 a plan view of the same with parts broken away.

Like letters refer to like parts in both of the figures.

A represents a cylindrical shell, preferably in sections and attached by a band A, overlapping the seam and detachably secured to each section.

B is a bottom ring in segmental sect-ions,

having its segments attached to each otherv by flanges and bolts B. Said ring has an inwardly-projecting flange B at the bottom to support the imperforate detached bottom A and an outwardly-projecting flange B to engage an inwardly-projecting ledge on the brick setting 0 to support the kettle and provided with a series of openings E, adjustably closed by dampers E. The brick setting is prolonged upward at O, forming a jacket around the shell and closed at the top by segmental plates F, resting on the brick setting 0 at the outer side and at the inner side on a band G, having a right-and-left coupling H. L is the chimney, opening upward from the top of the jacket. The brick setting is at a suitable distance from the kettle, and the space between them is divided horizontally by the flange B. The space below the said flange and the bottom A constitutes the combustion-chamber, and the space above said flange is a jacket-chamber.

To more effectually utilize the heat, I provide a series of vertical flues I near the shell and within the same, having elbows J at each end and nipples K in each elbow, the lower,

nipples extending through openings in the bottom ring below the flange B, and the upper nipples extending through openings in the shell above the same. These flues are detachably secured in place by an expansion ring G, engaging the flues and provided with a rightand left threaded coupling H.

D is the grate, located beneath the center of the bottom A.

The hot products of combustion flow radially and equally in all directions to the flues, and thence into the jacket-chamber, from which chamber they escape to the chimney L. By opening or closing the Various dampers E more or less the flow is directly into the jacket-chamber. Thus the heat may be nicely and evenly regulated or the draft increased at any point in the circumference of the kettle, and thus avoid the unequal strains and tendency to burn out due to unequal heating. If any section of the bottom ring needs repairing, this can be done without removing the others, or any one or more of the flues in like manner can be removed and replaced, or the whole kettle may be removed without disturbing the setting, or the kettle may be shipped, stored, or handled in the knockdown and be easily put together with an ordinary wrench.

I am aware that kettles for calcining-plaster having detached bottoms resting on a flange and flues passing horizontally through the kettle are not new. I do not claim such, broadly; but

What I claim is- 1.- Ina calcining apparatus, thecombination of a kettle, a flange surrounding the kettle, an imperforate bottom in said kettle and flues extending through the side of the kettle above and below the flange, substantially as de-v scribed.

2. In a calcining apparatus, the combination of a kettle, a setting surrounding the kettle and at a distance therefrom, a flange dividing the space between the kettle and setting, an imperforate bottom in said kettle, a combustion-chamberbelow the kettle,and lines ex tending through the side of the kettle at their respective end, andconnecting the spaces at each side of the flange, substantially as described.

3. In combination with a calcining-kettle, an outwardly-projecting flange surrounding said kettle and having a series of openings and dampers, and a series of flues in said kettle extending through the side thereof above and below said flange, substantially as described.

4. A calcining-kettle consisting of a cylindrical shell, a detached bottom, a bottom ring in detachable segments and having an inwardly-projecting flange to support the bottom, and an outwardly-projecting flange to support the kettle, and detachable flues havin g elbows and nipples and extending through said ring and shell at their respective ends and at each side of the outwardly-projecting flange and an expansion-ring to hold said flues in place, substantially as described.

5. A calcining apparatus consisting of a E cylindrical shell, a bottom ring supporting i the same and having an inner flange, an imperforate detached bottom supported by said flange, and an outer flange having a series of openings, dampers for said openings, a setting surrounding said kettle at a distance therefrom and engaging thelast-named flange, flues extending through said ring between said flanges at their lower ends and through the shell at their upper ends, and a grate and combustion-chamber below the kettle, substantially as described.

6. In combination with a kettle having an I imperforate bottom and supported within a setting at a distance therefrom, a series of vertical flues turned at substantially right angles at each end and extending through 3 the side of the kettle at each end, and a ring engaging said flues and provided with a right 5 and left threaded coupling, substantially as described.

In testimony whereof I afflx my signature in presence of two Witnesses.

WILLIAM '1. IOVVERS.

Witnesses:

J. W. SPOONER, GEO. A. HALL. 

